package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password=DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes(StandardCharsets.UTF_8)));
      //  employee.setCreateTime(LocalDateTime.now());
       // employee.setUpdateTime(LocalDateTime.now());
        //TODO
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.add(employee);
    }

    @Override
    public PageResult pagelist(EmployeePageQueryDTO employeePageQueryDTO) {

        if(employeePageQueryDTO.getName()!=""&&employeePageQueryDTO.getPage()>1){
            employeePageQueryDTO.setPage(1);
//            PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

            Page<Employee> employees= employeeMapper.pageall(employeePageQueryDTO);
            return new  PageResult(employees.getTotal(),employees.getResult());
        }
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> employees= employeeMapper.pageall(employeePageQueryDTO);

//        PageInfo<Employee> employeePageInfo = new PageInfo<>(employees);
     Long total=employees.getTotal();
        List<Employee> records=employees.getResult();

        return new PageResult(total,records);
    }

    @Override
    public void startorstop(Integer status, Long id) {
        Employee employee=Employee.builder()
                .status(status)
                .id(id).build();
        employeeMapper.update(employee);
    }

    @Override
    public Employee getbyid(Integer id) {
       return employeeMapper.getbyid(id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
       //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public void editpassword(PasswordEditDTO passwordEditDTO) {
        String oldpassword = passwordEditDTO.getOldPassword();
        String newpassword = passwordEditDTO.getNewPassword();
        oldpassword=DigestUtils.md5DigestAsHex(oldpassword.getBytes(StandardCharsets.UTF_8));
        passwordEditDTO.setOldPassword(oldpassword);
        Employee employee = employeeMapper.getBypassword(passwordEditDTO);
        if(employee==null){
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        newpassword=DigestUtils.md5DigestAsHex(newpassword.getBytes(StandardCharsets.UTF_8));
         Employee editemployee= Employee.builder().id(passwordEditDTO.getEmpId()).password(newpassword).build();
        employeeMapper.update(editemployee);
    }

}
